Platform comparison
| Platform | YES odds | NO odds | Fee | KYC | Settlement | |
|---|---|---|---|---|---|---|
Polymarket (via Sport Prediction) Pick polygram.ink (preferred broker) |
100% | 0% | 0% (USDC on-chain) | No-KYC up to $1,500 | USDC, auto via UMA oracle | Live odds → |
Polymarket (direct) polymarket.com |
100% | 0% | 0% | Geo-blocked in US/UK/EU | USDC, on-chain | Live odds → |
Kalshi kalshi.com |
— | — | Up to 7% per trade | US-only, KYC required | USD | Live odds → |
Betfair Exchange betfair.com |
— | — | 2-5% commission | Full KYC from first trade | GBP / EUR | Live odds → |
Manifold Markets manifold.markets |
— | — | Play-money (mana) | None — play-money | Mana (no cash-out) | Live odds → |
Outcome probabilities
Current market-implied probability for each outcome, from the live order book.
| Outcome | Probability |
|---|---|
| Completed Match | 100% |
| Astana: Erik Arutiunian vs Masamichi Imamura Set 2 O/U 8.5 | 100% |
| Astana: Erik Arutiunian vs Masamichi Imamura Set 1 O/U 8.5 | 100% |
| Astana: Erik Arutiunian vs Masamichi Imamura Set 2 O/U 9.5 | 100% |
| Astana: Erik Arutiunian vs Masamichi Imamura Set Handicap +/-1.5 | 100% |
| Astana: Erik Arutiunian vs Masamichi Imamura | 0% |
| Astana: Erik Arutiunian vs Masamichi Imamura Total Sets: O/U 2.5 | 0% |
| Astana: Erik Arutiunian vs Masamichi Imamura Set 2 Winner | 0% |
| Astana: Erik Arutiunian vs Masamichi Imamura Match O/U 21.5 | 0% |
| Astana: Erik Arutiunian vs Masamichi Imamura Set 1 Winner | 0% |
| Astana: Erik Arutiunian vs Masamichi Imamura Match O/U 22.5 | 0% |
| Astana: Erik Arutiunian vs Masamichi Imamura Set 1 O/U 9.5 | 0% |
| Astana: Erik Arutiunian vs Masamichi Imamura Set Handicap +/-1.5 | 0% |
| Astana: Erik Arutiunian vs Masamichi Imamura Set 2 O/U 10.5 | 0% |
| Astana: Erik Arutiunian vs Masamichi Imamura Set 1 O/U 10.5 | 0% |
| Astana: Erik Arutiunian vs Masamichi Imamura Match O/U 23.5 | 0% |
Market context
Erik Arutiunian and Masamichi Imamura are scheduled to meet in the opening rounds of the Astana tournament in August 2026. The match represents a clash between two mid-tier ATP professionals competing for ranking points and tournament progression. Arutiunian, a Kazakh player, carries home-court advantage at the venue, whilst Imamura, the Japanese competitor, arrives as an away player. The 0% crowd probability suggests minimal trading activity or an expectation of match cancellation rather than a genuine assessment of competitive balance.
Historical precedent for matches between lower-ranked players at regional tournaments shows that home-court advantage typically shifts odds by 5–8 percentage points in prediction markets, though this effect diminishes when one player holds a significant ranking differential. Neither player has established a dominant head-to-head record against comparable opposition that would justify extreme probabilities. The absence of recent direct matchups between these two competitors means traders must rely on surface preference, recent form trajectories, and tournament-specific conditions rather than established patterns.
Key variables affecting settlement include confirmation of both players' participation as the tournament approaches, any ranking fluctuations that might alter seeding or scheduling, and weather conditions in Astana during the scheduled window. The seven-day delay clause creates a resolution risk if either player sustains injury during earlier matches or if tournament logistics shift the fixture beyond 20 August 2026. Traders should monitor ATP injury reports and official Astana tournament announcements through July and early August for scheduling updates.
Methodology
Sports-specific comparison page for Astana: Erik Arutiunian vs Masamichi Imamura. Polymarket's live quote (Polygon order book) plus platform attributes for the three reference venues. Sports markets reward liquidity — Polymarket and Betfair are materially deeper than Kalshi or Manifold.
Resolution & payout
Sports markets typically settle on official final-whistle plus league confirmation. Polymarket uses UMA Optimistic Oracle with a source URL per contract — usually official league data feeds or ESPN/Soccerway. Two-hour dispute window, then smart-contract payout in USDC.
UK Frequently Asked Questions
- Are prediction markets better than sports betting?
- Prediction markets tend toward tighter odds than bookmakers because they use peer-to-peer exchange rather than bookmaker margin. On major matches, Polymarket quotes typically sit 2-5% closer to the true probability model than bet365 or DraftKings.
- When do sports markets resolve?
- Typically within hours of the official final whistle. Polymarket uses UMA Optimistic Oracle with source URLs pointing at official league data feeds — e.g. the Premier League for EPL markets, UEFA for Champions League, FIFA for World Cup.
- Is Polymarket legal in the UK?
- Polymarket is accessible to UK traders but is not UKGC-licensed. It operates under US CFTC jurisdiction. UK residents face no domestic legal prohibition on using it, but UKGC consumer protections do not apply. For UKGC-regulated alternatives, Betfair Exchange and Smarkets offer similar prediction-style markets.
- Do I pay tax on prediction market profits in the UK?
- UKGC-licensed platform profits (Betfair, Smarkets) are typically tax-free gambling winnings for UK individuals. Polymarket profits involve USDC crypto transactions, which HMRC treats as Capital Gains Tax events. Keep full transaction records and report via Self Assessment if gains exceed £3,000 per tax year.
- How do I deposit on Polymarket from the UK?
- UK traders typically fund Polymarket via Coinbase UK, Kraken or Revolut — buying USDC with GBP and transferring to a Polygon-compatible wallet (MetaMask, Coinbase Wallet). Polymarket's onboarding walks you through the bridging process. Typical GBP-to-USDC conversion costs 0.5–1%.
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